详解Python中os.path与pathlib的用法和性能对比

import os

# windows系统中测试

os.path.join("a/b", "c.txt")
# 运行结果 错误
# 'a/b\\c.txt'

os.path.join("a", "b", "c.txt")
# 运行结果 正确
# 'a\\b\\c.txt'

from pathlib import Path

Path("a/b").joinpath("c.txt")
# WindowsPath('a/b/c.txt')

Path("a").joinpath("b").joinpath("c.txt")
# WindowsPath('a/b/c.txt')

# os.path 方式
os.rename(os.path.join("a", "b", "c", "d.csv"), os.path.join("a", "b", "c.csv"))

# pathlib 方式
Path("a/b/c/d.csv").reanme("a/b/c.csv")

student = '{"name": "databook", "score": "90"}'
graduate_date = "2023-07-01"
home_directory = '/home/databook'

from datetime import date
from pathlib import Path

student = {"name": "databook", "score": "90"}
graduate_date = date(2023, 7, 1)
home_directory = Path('/home/databook')

import os

# 读取文件
fp = os.path.join("a", "b.txt")
with open(fp, "r") as f:
    f.read()

# 写入文件
with open(fp, "w") as f:
    f.write("hello")

from pathlib import Path

# 读取文件
Path("a/b.txt").read_text()

# 写入文件
Path("a/b.txt").write_text("hello)

def a(d="D:/miniconda3/Lib/site-packages"):
    from os import getcwd, walk

    extension = ".py"
    count = 0
    for root, directories, filenames in walk(d):
        for filename in filenames:
            if filename.endswith(extension):
                count += 1
                
    print(f"{count} Python files found")

if __name__ == "__main__":
    import time

    t0 = time.time()
    a()
    t1 = time.time()
    print(t1 - t0)

# 运行结果：
7875 Python files found
0.31201744079589844

def b(d="D:/miniconda3/Lib/site-packages"):
    from pathlib import Path

    extension = ".py"
    count = 0
    for filename in Path(d).rglob(f"*{extension}"):
        count += 1

    print(f"{count} Python files found")

if __name__ == "__main__":
    import time

    t0 = time.time()
    b()
    t1 = time.time()
    print(t1 - t0)

# 运行结果：
7875 Python files found
0.44898128509521484